Image Details
Caption: Figure 15.
The average theoretical electronic absorption spectra for 1–10 hexagons in neutral, cation, and anion states in the cata- and peri-condensed forms in the gas phase in the 100–800 nm wavelength range. The dashed line represents the central wavelength of the interstellar 2175 Å extinction bump and DIB 220 nm.
© 2026. The Author(s). Published by the American Astronomical Society.